BayStar HK4300-4 Hydraulic Marine Steering Kit

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SKU:
HK4300-4
Condition:
New
  • BayStar HK4300-4 Hydraulic Marine Steering Kit
  • BayStar HK4300-4 Hydraulic Marine Steering Kit
  • BayStar HK4300-4 Hydraulic Marine Steering Kit
  • BayStar HK4300-4 Hydraulic Marine Steering Kit
  • BayStar HK4300-4 Hydraulic Marine Steering Kit
MSRP: $1,183.99
$869.99
— You save $314.00
In Stock - Ships FREE within 24Hrs M-Thu

Description

BayStar HK4300-4 Hydraulic Marine Steering Kit

The Dometic SeaStar HK43004 Baystar Steering Kit is for single helm, single outboard boats that reach speeds of 55 mph and 150hp. If your boat can reach over 55mph, or a pontoon you'll need a Seastar kit.

Important: BayStar Helm Update to -4

The latest series of helms have been redesigned to provide a better experience for the vessel operator:

  • New valve technology ensures tighter, quieter, and more responsive steering, while minimizing the potential for chattering when dealing with overrunning steering loads.
  • More durable check valves, making the entire steering system more resilient to the rigors of trailering.
  • Revamped Design to enhance their aesthetics, and has introduced a new fill port plug design for easier maintenance.
  • Kits with hoses are discontinued, you can add hoses at an extreme discount above.
  • HK4300-4 replaces the HK4300A-3, HK4300 and is the direct replacement

Choose Hose Length & Fitting Style:

  • Add any HO5100 steering hose length with the drop down above, including odd part numbers.
  • Choose to upgrade the hose fittings to stainless steel, ideal for salt water applications.
  • These options are specific to Seatech Marine Products.
  • NOTE: HO5100 are being replaced with the part number HO5900. The only change is the part number and packaging, nothing with the actual part.

What's Included:

  • HH4314-4 1.4 Front Mount Helm Pump
    • Shaft Size: 3/4" Taper
  • HC4645-3 Compact Outboard Cylinder
    • 5.2 turns lock to lock
    • Displacement: 7.30in³/rev
    • Includes a HA5438 Bottle Fill Kit
    • Can be swapped to another BayStar cylinder using one of the Conversion Kits below
  • HA5430H SeaStar Hydraulic Steering Fluid
    • Quantity: 2 Quarts

At an Additional Cost:

  • HO5100 10-35' Standard Hoses
    • PSI Rating: 1000
    • Length: 10ft - 35ft
    • Connections: Brass or Stainless Steel
    • NOTE: Hoses purchased with this kit are 60% cheaper than purchasing alone

Need a Different Cylinder?

You can purchase one of the Conversion Kits below to change out the HC4645-3 for another BayStar cylinder:

Kit Link Description
HA4640 Conversion Kit for this cylinder HC4645-3
HA4641 Conversion Kit to the HC4647-3
HA4642 Conversion Kit to the HC4648-3
HA4643 Conversion Kit to the HC4658-3

Other Options:

Downloads and Resources:

  • BayStar Outboard Steering Cylinder Installation Manual [PDF
  • SeaStar Outboard Brochure [PDF
  • BayStar Front Mount Helm Installation Manual [PDF]
  • BayStar Fill and Bleed + Troubleshooting Guide [PDF]
  • SeaStar Hydraulic Steering Selection Guide [PDF]
  • SeaStar Marine Steering Catalog [PDF]
  • Dometic Seastar Hydraulic Build Guide [HERE]

Questions?


  • No Sales Tax on Purchases Outside of California
  • Buy Now Pay Later with Affirm or PayPal Pay Later
  • FREE Ground Shipping to the Contiguous 48 States
  • Formerly Teleflex, Seastar is now Dometic Marine
  • Seatech Marine Products, Inc. is an authorized dealer, and service center for Dometic Marine

International, USVI, Puerto Rican, Hawaiian & Alaskan Customers: We Ship Worldwide and USPS, Shipping Cost May Quote Too High on Our Website, Contact Us for A Quote.

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Warranty Information

Seatech Marine Products is an authorized dealer for Dometic that distributes Seastar Products, this part has a 2 Year Limited Warranty from them. Please visit their website for full details: https://www.dometic.com/en-us/outdoor/support/warranty-statements
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1 Review

  • 5
    Baystar steering

    Posted by Jim P on 6th Aug 2025

    Great product and great service from Seatech Marine

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